4 Bolton, "Mark SHrrup'' Collcciion of Fossil Insects. 



ous series of twigs are shown in the outer apical area, and 

 between the middle Ihie and the inner margin. 



The precise relationship of all these is a matter largely 

 of conjecture. A radial sector is undoubtedly present, and it 

 may possess one to three sub-di\'isions. In any case the radial 

 sector arises close to the base of the radius, and in all proba- 

 bility gives off the median in the basal fourth of the wing. An 

 important vein giving off three twigs in the middle of the apex 

 of the wing is apparently the innermost division of the radial 

 sector. The median vein bends inwards from its junction with 

 the radial sector, and then passes along the middle line of the 

 wing towards the apex, where it curves inwards and ends upon 

 the margin. From the fragmentary portions of twigs which 

 remain, it clearly gave off a numerous series of parallel and 

 curving simple twigs, which occupied the whole of the outer 

 third of the inner margin of the wing. The cubitus apparently 

 consisted of two or more branches passing hrst inwards and 

 then outwards in sigmoidal curves. A little beyond the middle 

 of their length, the cubital veins fork, and end upon the wing 

 margin in 8-9 twigs. 



Traces of a few anal veins arc present. The anal area 

 appears to have been small. The chief features of the wing 

 may be summarised as follows: — Outer and inner wings, mar- 

 gins almost straight and parallel to each other. Apex of wing 

 bluntly rounded. Sub-costa feeble, and joining on to the 

 radius distally. Radius straight, and giving off radial sector 

 low down. Intercostal and radial areas narrow, so that the 

 sub-costa, radius and radial sector lie in the outer third of the 

 wing. Radial sector consisting of two, possibly three, divi- 

 sions, the innermost giving off a few simple twigs to the wing 

 apex. Median vein large, much divided, and arising in union 

 with the radius and radial sector. Cubitus of two-three 

 branches. Anal area small. 



Legs. — The fore and hind pair of legs are fairly well 

 preserved. The middle pair are represented iDy the femora only. 

 The hind legs are the longest, and as they now lie, have the 

 femora bent back close to the abdomen, and the tibiae are at 

 right angles. The tarsal segment of the right hind leg seems, 

 long, but it IS not well defined. That of the left leg is missing. 

 The fore legs show the femora placed at right angles to the pro- 

 thorax, whilst the tibiae are directed forwards, and the tarsi 

 bent a little outwards. The tarsi are slender, and the femora 

 show no trace of thickening, such as is characteristic of the' 

 Locustidcc. 



Abdomen. — The general appearance of the abdomen has 

 been already noted. Its segments are clearly discernible. The 

 ventral surface of each bears two low ridges, disposed longi- 

 tudinally, and placed midway between the middle line and the 

 sides of the segments. It is not quite clear whether the sides 

 of the segments were carried out into blunted tubercles or not. 



